Description
LSEG is seeking a Senior Penetration Tester to join our internal offensive security team. This role is hands-on and deeply technical, responsible for planning and executing penetration tests across a wide range of systems and applications.
Key Responsibilities
- Conduct in-depth penetration tests on applications, infrastructure, and cloud environments.
- Take full ownership of assigned pentesting engagements end-to-end and deliver with limited oversight.
- Compile technical scoping documents, track and document assessment metadata, including engagement details, testing team members and roles, tools and methodologies used, schedule and timelines, target systems and environments, constraints, exclusions, and limitations.
- Document findings clearly and concisely, providing actionable remediation guidance.
- Collaborate with application teams to scope, execute, and report on security assessments.
- Contribute to team improvement efforts and ensure all initiatives and feedback are well documented for future references.
- Contribute to the continuous improvement of testing methodologies, tooling, and automation.
- Stay current with emerging threats, vulnerabilities, and offensive security techniques.
- Participate in R&D initiatives as guided from leadership.
- Support knowledge sharing and mentoring within the team.
- Develop and maintain custom tools, scripts, and exploits to support testing activities.
Required Skills & Experience
- Proven hands-on experience in penetration testing of Web Applications, APIs, Thick Client and Common Infrastructures (Active Directory, Cloud and Cloud-native based environments).
- Proficiency with tools such as Burp Suite, common command-line tools, and ability to write custom scripts when needed.
- Experience in automating pentesting tasks.
- Strong understanding of application security, network protocols, and operating systems.
- Experience with cloud platforms (AWS, Azure, GCP) and containerized environments (Docker, Kubernetes).
- Ability to write clear, technical reports and communicate findings to both technical and non-technical stakeholders.
- Experience working in large, complex enterprise environments.
- Fluent communication skills in English, both written and verbal.
- Relevant certifications and engagement with the security community is a plus.
- Threat Modelling experience is a plus.
Benefits
- LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days, and wellbeing initiatives.